This is a variation of the popular "Schmazey" Photoshop action. In addition to creating many dark red tones throughout your image, this action also adds some contrast, fades the shadows and highlights, throws in some film grain and a whole bunch more to give . This is one of my personally most used Photoshop actions and it has been tested and fine-tuned over a long time. It was developed using Photoshop CC and I've found that it looks best on hi-res images with a shallow depth of field.